HRX-OM-W058
Chapter 5 Display and setting of various functions
5.11
Anti-freezing function
HRS-R Series
5-28
5.11 Anti-freezing function
5.11.1 Anti-freezing function
The product can prevent the circulating fluid from freezing during winter time.
If there is a possibility of the circulating fluid freezing due to changes in the
installation and operating environment (operating period and weather), set
the protection in advance.
If the circulating fluid temperature falls below 3
o
C
, the pump will start
operating automatically.
The heat generated by the pump operation will warm up the circulating
fluid.
When the circulating fluid temperature reaches 5
o
C
or higher, the pump
will stop operating automatically.
As a result, the circulating fluid maintains a temperature of between 3
o
C
and 5
o
C
, preventing freezing.
If the anti-freezing function is set, [RUN] lamp flashes for 2 sec. during
waiting (pump does not operate). The [RUN] lamp flashes at 0.3 sec.
intervals during the automatic operation of the pump. The default setting of
this function is “OFF”.
This function starts in stand-by condition.
Fully open the valve or manual bypass valve arranged by the
customer so that the circulating fluid can circulate when the pump
starts automatic operation.
In extremely cold weather conditions, the heat generated by the
pump as described above may not be enough to prevent freezing.
During the automatic operation, the pump does not stop even if you
press "RUN/STOP" key.
In an emergency, stop operation by shutting off the power supply.
